Detector for stop motion mechanism in winding machines



Oct. 25, 1938. E. R. ALDl-:RMAN 2,134,018

DETECTOR FOR STOP MOTION MEOHANISM IN WINDING MACHINES 4 Sheets-Sheet -l Filed March 25, 1957 l I 4)' r'llllllll lll ATTORNEYS Oct. 25, 1938. E. R. ALDERMAN 2,134,018

yDETECTOR FOR STOP MOTION MECHANISM IN WINDING MACHINES Filed Maron 25, 1937 4 sheets-sheet 2 INVENTOR [ggf/ue E 4Min/:14N

ATTORNEYS C. 25, 1938. E R, ALDERMAN f 2,134,018

DETECTOR FOR STOP MOTION MECHANISM INWINDING MACHINES Filed March 25, 1937 v 4 Sheets-Sheet 3 ATTORNEYS @ai 25, 1938. E. R. ALDERMAN 2,134,018

DETECTOR FOR STOP MOTION MECHANISM IN WINDING MACHINES Filed March 25, 1937 4 Sheets-Sheet 4 5 57 M3 /fsz/M/o/v 56 O -47 56 f/sf/Ar/o/v m I' l i l I Il: 4@

l E. INVENTOR bef/Vf E 40E/PMA# 33 BY ATTORNEYS Patented Oct. 25, 1938 UNITED STATES DETECTOR FOR `STOP MOTION MECHANISM IN WINDING MACHINES Eugene R. Alderman, South Hadley,

signor to Foster Machine Company,

Mass., a corporation of Massachusetts Application March 25,

2 Claims.

This invention relates to winding machines,

and has for its object lmore particularly an improvement in stop motion mechanism for stopping the winding spindle when the yarn on the supply bobbin becomes exhausted and before the exhaust `end of yarn has been wound on .the package.

In order that the stopping shall occur lbefore the exhaust end of yarn has been ,run in through `the several guiding and tension devices onto the winding package, the improvement provides for a detector mechanism at a point closely adjacent the end of the supply bobbin which will be normally kept inactive by the tension of the yarn coming off the supply bobbin and which will serve to actuate suitable stop mechanism immediately ywhen the last end of `the yarn runs off said supply bobbin. By vstopping the winding spindle in this manner it becomes feasible to arrange a convenient position for tying in a new end of a full bobbin before the exhaust end runs through the guiding Ydevices and thus avoid the trouble .and lloss of time of manually threading in the new end.

A further feature of improvement in conjunction with such means for quickly stopping .the Winding spindle upon exhaust of the supply is an arrangement for having the last end of yarn left hanging in convenient position for the operator to tie in the new supply without the necessity as heretofore or" manually rethreading the new end through the several guiding and tension devices .and without `the trouble of hunting for the exhaust end on `the wound package. This arrangement saves the time and labor of the operator and avoids Wastage of yarn.

In the following description the term bobbin as used is intended to mean any form of supply such as from a bobbin, cop, quill, etc., and the term yarn will be referred to as meaning any fiber used in textiles such as wool, cotton, silk, etc., or any material being Wound, such as Wire, paper, glass, etc.

Full advantages of my new improvement will become more clearly apparent from the following specification, taken in connection with the accompanying drawings, in which Fig. l is a side elevation of a winding machine unit showing the stop motion and yits associated mechanism;

Fig. 2 is a similar View in part showing the position of the mechanism when the winding spindle is stopped; y

Fig. 3 is a detail view somewhat enlarged showing in front elevation, the latching member;

1937, serial N0.i133,050

(c1. 24a-3i) Y Fig. 4 is aview alo-ng section 4%-4 .ofFig 3 looking in the direction of the arrow;

Rg. 5 is a detail View in side elevationof the detector mechanism;

Fig. 6 is a top plan view of the same;

Fig. 7 is a section along line 1--1 of Fig. 5, looking in the direction of the arrows;

Fig. 8 is a View along line 8--8 of Fig. 9, showing in detail a front view of the tripping latch arranged for electrical operation; j

Fig. 9 is a side elevation .of the detector and tripping mechanisms arranged for operation electrically; and y Fig. 10 is a detached detail view of the supply bobbin .spindle and its Spring retainer.

. The winding machine to which the present invention is applied is of theV usualwell known character and comprises a main frame l, swinging support 2 for Vwinding spindle 3, the 1atterbe ing driven by surface contact of its package 6 with the usual driving roll 4 of the machine'. YA'

brake and throw off armlextends beneath and slightly spaced from the yarn package 5 being Vwound on the spindle 3 and saidarm 5 is ad- .justably mounted upon an angle member l pivoted on the main frame at 8. A rocking of said angle member 'i to the dotted line position shown in Fig. l will lift the .winding spindle 3and its package 6 from the driving roll 4 and effect stopping of the same by the brake action of said arm 5.' The angle member l is under the stress of a spring 9 tending at all times to rock it counterclockwise into its stopping position. It is normally held from such rocking action by reason of a forward Ynose portion l0 integral with the lower arm of the member fl which is adapted to rest against a cam block il, the latter forming part of a knock olf plate l2- pivoted at` It on the main frame. Theknock off plate l2 carries at its under side a bell crank lever or knock olf dog i4 pivoted at I5 thereon and having its down-r wardly extending arm' I6 adapted to fall into position so as to vbe engaged by teeth of the usual constantly rotating kicker shaft I1.` When the said arm I6 is engaged by the kicker shaft Il the knock off plate is thrown upwardly in the usual manner 'to release the cam block Il from beneath the nose l0 of the angle member? for stopping the winding spindle, and the parts in this knock off position are shown clearly in Fig. 2.

The knock cli dog i4 has extending forwardly thereof a tripping member I8 and is adapted to be held in normal inactive position by a latch i9 as lshown in Fig. 1. The latch I9 is in the form of a flat narrow-edged blade xed to a latch member 20 pivotally mounted as shown in Fig. 3 by bearings 2| and 22 upon a xed bearing rod 23 which extends laterally from a bracket 24 extending from the main frame. The latch member 20 has a crank arm 25 which is adjustably connected by a rod 26 to the detecting mechanism hereinafter described. The rocking movement of the latch member 20 upon its bearing rod 23 is limited by a stop piece 21 adapted to be adjustably fastened by a stud screw 28 to said bearing rod 23. The stop piece 21 has spaced bosses 29 and 30, one at each side of the tripping member 20 as shown in Fig. 4. Extending downwardly and forwardly from the main frame I is a bracket 3I which supports at its lower forward end a. supporting rail 32 extending lengthwise of the machine and upon this rail v32 is aflixedly mounted the aforesaid bracket 24 by stud Vscrew 33. It will be understood that windingmachines `of this: character usually comprise several Winding units and individual stop mechanisms for the same and that the longitudinally extending rail 32 supports several supply bobbins at intervals along the same. As shown in'Fig. 2 a bobbin pin support 34 extends forwardly from the bracket 24 and adjustablyrsupports at its outer end the bobbin pin 35. A base member 36 for seating the bobbin 31 is adjustably fixed in suitable position on said pin 35. As kshown in Fig. 10, a spring retainer 38'is mounted on the bobbin pin for firmly retaining the bobbin thereon. 'I'his spring retainer is preferably formed of tubular 'sheet steel with bulbous portions 39 having slits 40 therein so as to compressibly fit within the core of the bobbin and accommodate itself to bobbins having cores of slightly different diameter. I

As shown in Fig. 1, yarn y is drawn from the supply bobbin upwardlyV through ,detectingV mechanism and then for a considerable vertical distanceto the linitial yarn guide andtension device 42, the latter being carried upon arm 4Il extending upwardly and forwardly from the main frame of the machine. The initial guide and tension device 42 comprises the usual spring pressed roll members and may have any Suitable wire guide, not shown, for keeping the yarn from jumping said roll. From the roll 42 theyarn y is led downwardly under and over tension guide rollers 43 and 44 through the eye145 ofthe usual drop wire detector and then upwardly again to the traversing guide 46 and thence to the Winding package 6 upon the winding spindle 3. The vertical distance between the top of the supply bobbin 31 andv the initial yarn guide and tension .device 42 is intended to be shown in Fig. l as being sufficient to permit a stopping of the yarn by the detector mechanism as hereinafter described, as soon as the last end of yarn leaves the supply bobbin and before it runs over the` initial guide device42. For this purpose the initial guide device 42 is arranged at about the height of the ordinary operators head whereas the supply bobbin support is about waist high. By this arrangement the exhaust end of yarn will be left hanging from the guide device 42 in convenient position for the operator to tie in the new end of a full bobbin.

The ldetecting mechanism for determining when the exhaust end of the yarn comes oif'the supply bobbin and thereupon actuates the stopping mechanism is preferably located as shown in Fig. l just above the upper end of said supply bobbin 31. A vertical standard 41v extends upwardly from the longitudinal support rail 32 and at the upper end of said standard 41 is adjustably mounted a supporting bracket 48. At the forward end of said bracket 48 is mounted a bell crank lever 49-50 pivoted at 5I thereon and the arm 50 of said lever is connected by the previously described connecting rod 26 to the crank 25 of the tripping member 20.

Referring to Fig. 5, a fork finger bracket 52 is fastened to the support bracket 48 and extending from the upper end of said bracket 52 are fixed two parallel horizontal fork fingers of wire V53 and 54. Pivotally mounted on pivot stud 55 of said bracket 52 is a third horizontally extending wire finger 56 located halfway between the aforesaid fixed fingers 53 and 54. The outer ends of the two fixed fingers 53 and 54 are bent in one direction and the outer end of the intermediate finger 56 is bent in the other direction to facilitate the threading of the yarn strand, between said fingers, that is against one side of the two fingers 53 and 54 and against the other side of the finger 56, as will clearly appear in Figs. 5 and 6. A torsional spring 51 is arranged in connection with the movable ngers 56 tending to swing the same between the two'fixed fingers 53 and 54 in a clockwise direction as shown in dotted lines in Fig. 6. A rear end or tail portion 58 of said movable finger 56 is at the other side of its pivot so as to engage the arm 49 of the bell crank 49-50 previously mentioned, and when said movable finger 56 is permitted tomove to its dotted line positionA as shown in Fig. 6, the bell crank lever 49-50 will be operated in the proper manner for removing the latch I9 from beneath the tripping member I8 and thus cause a stopping of the winding spindle. The inward or clockwise swinging movement of the finger 56 about its pivot 55 is limited to the dotted line 'position of said finger as shown in Fig. 6, and

the outwardly bent end portions of saidflngers v.form .a flaring entrance for threading the yarn between the fingers as above stated. The limiting stopV forthe inward movement of finger 56 flo is furnished by the lug 29 on stop piece 21 by` reason of the connective devices shown.

In the normal running of the winding spindle the' yarn as it is drawn off at high speed from the supply bobbin 31 balloons out as shown in Fig. 1 and creates a sufficient tension at each side of the detecting device so that the yarn in traveling between the three fingers of said detecting device will hold the movable finger 56 in substantial parallelism with the two fixed fingers 53 and 54V as shown in full lines in Fig. 6. When the exhaust end of yarn comes off the supply bobbin the Vtension of the yarn below the detecting device ceases and the movable finger 56 is permitted to swing inwardly to its dotted line position shown in Fig. 6 whereby as described the tail end 58 of said movable finger actuates the bell crank 49-50 which in turn moves the latch I9 from under the trip member I8 and permits the latter to drop. The tripping movement of the knock off dog I8-I4 causes the knock off plate to be thrown upwardly by the kicker shaft a full Asupply bobbin which replaces the empty 'bobbin on the bobbin pin 35. By this arrangenbracket 48.

ment the necessity of manually rethreading the end of the new bobbin through the several guiding tension devices is eliminated and the replenishing operation is clearly facilitated.

In some cases it is desirable to operate the latch and tripping member electrically and for this purpose the modification shown in -Fig. 9 is provided. The main parts of this apparatus are as above described with the exception that the bell crank 49-50 and its connecting rod 26 to the crank rod 25 of the-tripping member are eliminated. As shown in Fig. 9 an electro-magnetic device 6D is mounted on the bracket 24 and has its pole pieces 6l arranged in near but normally spaced relation from an armature member 62 which is adjustably carried upon the arm 25 of the trip member 20. The energizing circuit of the electro-magnetic device is from an electrical source of supply, not shown, through wires 63 connected to each side of the electromagnetic device 60 and to a movable switch member 64 pivoted on an insulated pivot 65 upon the A fixed switch member 66 is mounted on said bracket 48 and has a return Wire 61 connected back to the electrical source of supply. The movable switch member 64 has a weighted portion 68 at the other side of its pivot to normally hold it in open position with respect to the xed Contact 66. The tail end portion 58 of the movable finger 56 bears against one side of the movable contact 64 to move it into circuit closing position with respect to 66 whenever the nger 56 is moved into its dotted line position as shown in Fig. 6. The fixed switch member 64 furnishes a limiting stop for the inward swinging of the finger 56. When the energizing circuit for the electro-magnetic device 60 is closed as described the armature 62 will be attracted to move the latch I9 from under the tripping member I8 and,

cause the stopping of the winding spindle in the manner previously described.

I claim:

1. In a winding machine in combination, a Winding spindle, a supply bobbin and a support therefor, an initial guide device for yarn located vertically at a suflicient distance above said supply bobbin to permit theyarn running if said supply bobbin being stopped Within said distance, whereby the end of a new bobbin supply may be tied to the end of the exhausted bobbin supply in the space between said bobbin support and said initial yarn guide device, and detecting mechanism located above the bobbin on said support, comprising a pair of fixed fingers spaced slightly apart, and a movably mounted finger located between said xed fingers, said fingers being adapted to receive the running yarn Vin bearing relation therebetween, viz, over the fixed ngers and under the movable finger, means causing the movable linger to press against the yarn bridging the fixed iingers and to move relatively to said fixed fingers when the yarn is absent or suciently slack in tension, a stop motion mechanism comprising means to stop said Winding spindle including a tripping member and a latch to hold said tripping member against release, an electromagnetic device for moving said latch in release of said tripping member, an electric circuit and switch for said electric magnetic device, and means operable by said movable finger to actuate said switch.

2, In a winding machine in combination, a winding spindle, a supply bobbin and a support therefor, an initial guide device for yarn located vertically at a suiiicient distance above said supply bobbin to permit the yarn running off said supply bobbin being stopped within said distance, whereby the end of a new bobbin supply may be tied to the end of the exhausted bobbin supply in the space between said bobbin support and said initial yarn guide device, and detecting mechanism located above the bobbin on said support and between said bobbin and the initial guide device, said detecting mechanism comprising a grid guide of spaced fixed fingers and an intermediate movable nger adapted to receive the yarn in running relation therebetween, viz, over the xed fingers and under the movable nger, said movable nger having limited movement inwardly between said xed fingers, said fingers being so formed at their outer portions that when said movable finger is in the inmost position a flaring entrance is provided for threading the yarn between said fingers in running relation, means causing the movable finger to press against the yarn bridging the fixed ngers and to move relatively to said fixed fingers when the yarn is absent or sufficiently slack in tension, a stop motion mechanism comprising means to stop said winding spindle, and means operable by said movable nger to actuate said stop motion mechanism.

EUGENE R. ALDERMAN.

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